cs89712 Cirrus Logic, Inc., cs89712 Datasheet - Page 166

• Manufacturer Part Number: cs89712
• Description: High-performance, Low-power System-on-chip With 10base-t Ethernet Controller
• Manufacturer: Cirrus Logic, Inc.

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Inter-Packet Gap
Time interval between packets on the Ethernet.
Minimum interval is 9.6 ms.
Jabber
A condition that results when an Ethernet node
transmits longer than between 20 ms and
150 ms.
Packet
The entire serial string of bits transmitted over
an Ethernet network. This includes the pream-
ble, Start-of-Frame Delimiter, Destination Ad-
dress, Source Address, Length field, Data field,
pad bits (if necessary), and Frame Check Se-
quence (FCS, also called CRC). A packet is a
frame plus the Preamble and SFD.
Slot Time
Time required for an Ethernet Frame to cross a
maximum length Ethernet network. One Slot
Time equals 512 bit times.
Suspend
Used to conserve power. When in Suspend
mode, the Ethernet port can be awakened only
by software command.
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Suffixes Specific to the Ethernet port
These have meaning only at the end of a term:
A
CMD
CFG
CTL
Dis
E
h
iE
ST
Transfer
Moving frame data across the memory bus
from the Ethernet port RAM to system RAM.
During receive operations, only frame data are
transferred (preamble and SFD are stripped off
by the CS89712’s MAC engine). The FCS may
or may not be transferred, depending on the
configuration. Transfers are counted in bytes.
Transmit Collision
The receive inputs, RXD+/RXD- (10BASE-T)
are active while a packet is being transmitted.
Transmit Request
A Transmit Request is issued by the software to
initiate the start of a new packet transmission.
Accept
Command
Configure
Control
Disable
Enable
Indicates the number is hexadecimal
Interrupt Enable
Status
CS89712
DS502PP2